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Finding the Fourth Proportional to 3,137.88, 4,703.94 and 1,405.56

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Solution

The fourth proportional to 3,137.88, 4,703.94 and 1,405.56 is: 2,107.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,137.88 : 4,703.94 = 1,405.56 : x
  2. Step 2: Convert to fraction form
    3,137.88/4,703.94 = 1,405.56/x
  3. Step 3: Cross multiply
    3,137.88x = 4,703.94 × 1,405.56
  4. Step 4: Simplify right side
    3,137.88x = 6,611,669.91
  5. Step 5: Solve for x
    x = 6,611,669.91/3,137.88
  6. Step 6: Final answer
    x = 2,107.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.